Luke
Acts 15:31ESV·traditional attribution

And when they had read it, they rejoiced because of its encouragement.

John Calvin Reformed @genevareformer

31. They rejoiced over the consolation. Seeing that the epistle is so short, and containeth nothing but a bare narration, what consolation could they have by it? But we must note, that there was no small matter of consolation therein, because, when they knew the consent of the apostles, they were all pacified, and also whereas before there was variance among them, they are now reconciled one to another.

Matthew Henry Presbyterian @wholebiblehenry

We have here the result of the consultation that was held at Jerusalem about the imposing of the ceremonial law upon the Gentiles. Much more, it is likely, was said about it than is here recorded; but at length it was brought to a head, and the advice which James gave was universally approved and agreed to nemine contradicente - unanimously; and letters were accordingly...

Commenting on Acts 15:22-35

John Gill Reformed Baptist @doctorgill

Which when they had read,.... That is, when the brethren of the church at Antioch had read the letter delivered to them; for not Paul and Barnabas, or Judas and Silas, who were sent with it, read it, but the brethren to whom it was sent, as was proper.